Throttle-valve for motive-fluid tools.



No. 656,195. Patented Aug. 2|, I900. c. H. Jam son. THROTTLE VALVE FOR MOTl VE FLUID TOOLS.

(Application filed Jan. 31, 1900.

(N o M o d a l we norms PETERS co, PHO'ILO-LITHOY summon. o. c.

UNITED STATES ATENT Fries.

CHARLES HARRIS JOHNSON, OF CHICAGO HEIGHTS, ILLINOIS, ASSIGNOR TO 'THEJOHNSON, PARFITT TOOL COMPANY, OF SPRINGFIELD, ILLINOIS.

THROTTLE-VALVE FOR MOTlVE-FLUID TOOLS.

' SPECIFICATION forming part of Letters Patent 0. 656,195, dated August21, 1900.

Application filed January 31, 1900. serial N01 5 7- (N0 m l To all whomit may con/067 1 Be it known that I, CHARLES HARRIS J OHN- SON, acitizen of the United States, residing at Chicago Heights, in the countyof Cook,

State of Illinois, have invented certain new and useful Improvements inThrottle -Valves for Motive-Fluid Tools; and I hereby declare thefollowing to be a full, clear, and exact description of the same,reference being had to the accompanying drawing, which shows inlongitudinal central section a construction embodying my invention.

My invention relates generally to throttlevalves formotive-fluid-operated tools, but especially to the class which may betermed hand-tools-such, for instance, as pneu matic drills, hammers,&c.and has for its object the production of a simple and efficientthrottle adapted, if desired, to be used as a handle for manipulatingthe tool and at all times enabling the operator to regulate or cut offthe motive fluid without losing. control of the tool.

In carrying out my invention I arrange in the same plane or axial linetwo sections of the induction-pipe whereby the motive fluid is admittedto the tool, one provided with a valve-seat and the other with a valve,and combine the same by sleeve or other suitable means, causing theapproach and permitting the recession of the sections of theinductionpipe, so that the valve may be opened or closed partially orentirely at the will of the operator, and -such a construction'or itsequivalent embodies the main feature of my invention.

There are other minor features of invention, all as will hereinaftermore fully appear.

I will now proceed to describe my invention more fully, so that othersskilled in the art to which it appertains may apply the same.

In the drawing, 1 indicates a motive-fluidsupply pipe leading to orconnected with a pneumatic drill or like tool to be. operated,

and, if desired, the same may constitute the handle or one of thehandles thereof. Said pipe 1 at its outer end is reduced in diameter,asat 2, to form a valve closed at its extremity and perforated adjacentthereto, as at 3, with a suitable port or ports. The exterior diameterof pipe or tube 1 just back of the reduced portion or valve-section 2 issomewhat greater .than at other points, so as to form an annularshoulder or collar 1 to retain a coupling-sleeve 4, and is threaded, asat 1", for the reception of a thread on the interior of saidcouplingsleeve l.

5 is a second section of the motive-fiuid-induction pipe, whose innerdiameter corresponds with the external diameter of the reduced portionor valve-section 2 of inductionpipe 1, except at the point where it iscontracted to form a valve-seat 5. for the closed end of valve-section2. The inner end of section 5 of the induction-pipe is provided with acollar 5 for engaging the coupling-sleeve 4: and at its outer end may bethreaded, as at 5, or provided with other suitable means for connectionwith the motive-fluid supply.

The pipe-sections 1 and 5 are arranged in axial line, so that whenbrought into contact the valve-section 2 will enter the section 5 andclose the opening of valve-seat 5 and may be combined by means of acouplingsleeve 4, as before noted.

4 indicates a coupling-sleeve by means of which the pipe-sections 1 and5 are combined and caused to approach each other when the throttle is tobe closed. This coupling-sleeve is provided at one end with an interiorannular shoulder or flange 1", which engages the shoulder or collar 1 ofpipe-section 1 and is threaded on its interior to engage the thread 1"of said pipe-section, and said thread on the interior of thecoupling-sleeve 41 is extended so as to receive a threaded annulus orcap 6, which surrounds the pipe-section 5 and engages the collar 5thereof.

6* indicates a lock-pin to prevent the rotation of annular cap 6 when ithas been screwed home in the end of coupling-sleeve 4.

The construction being substantially such as hereinbefore pointed out,the parts will be combinedby threading the coupling-sleeve 4 on thethreaded end of pipe-section 1 until the shoulders 1 l are insubstantial engagement, then passing the annular cap 6 over pipe-section5 until the same engages collar 5*, after which the pipe-section 5 ispassed over the reduced or valve end 2 of pipe 1, and the annular cap 6screwed home in the end of coupling-sleeve 4 and secured againstrotation by the locking pin 6 or equivalent means.

The coupling-sleeve 4 being sufficiently long between collar 4; and cap6, by rotating the same the pipe-sections 1 and 5 are made to axiallyapproach to close or recede to open the valve.

Having thus described myinvention, What I claim, and desire to secure byLetters Patent, is

1. In a throttle-valve for motive-fluid-operated tools,,thc combinationof a plurality of axially-arranged pipe-sections comprising a valve anda valve-seat, and a coupling-sleeve adapted to cause the axial approachand permit the recession of said sections, substantially as and for thepurposes specified.

2. In a throttle-valve t'or motive-fluid-operated tools, the combinationof a plurality of axially-arranged pipe-sections comprising a valve anda valve-seat, one of said sections being threaded on its exterior, andan internally-threaded coupling-sleeve for adj ustably connecting saidvalve and valve-seat sections, substantially as and for the purposesspecified.

3. In a throttle-valve for motive-fluid-operated tools, the combinationwith a pipe-section threaded on its exterior and having its end ofreduced diameter and constituting a valve, of a second pipe-sectionwhose inner diameter corresponds with the external diameter of thereduced portion of the firstnamed section the bore of the second sectionreduced to constitute a valve-seat, and an internally-threadedcoupling-sleeve for adjustably connecting said valve and valve-seatsections, substantially as and for the purposes specified.

In testimony whereof I aifix my signature, in presence of two witnesses,this 27th day of January, 1900.

CHARLES Witnesses H. H. VAUGHAN, GEO. I. MCELDOWNEY.

HARRIS JOHNSON.

